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Joseph jogs from one end A to the other end B of a straight 30

Science

Class 9

NCERT

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An athlete completes one round of a circular track of diameter

200 m

40 s

. What will be the distance covered and the displacement at the end of

2

minutes

20 s

Joseph jogs from one end A to the other end B of a straight

300 m

road in 2 minutes 30 seconds and then turns around and jogs

100 m

back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Abdul, while driving to school, computes the average speed for his trip to be

20

h^{- 1}

. On his return trip along the same route, there is less traffic and the average speed is

30

h^{- 1}

. What is the average speed for Abdul's trip?

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Question

Medium

Solving time: 4 mins

Joseph jogs from one end A to the other end B of a straight $300 m$ road in 2 minutes 30 seconds and then turns around and jogs $100 m$ back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Views: 6,475 students

Updated on: Aug 28, 2023

Book:

Science (NCERT)

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Harper Discussed

Joseph jogs from one end A to the other end B of a straight

300 m

road in 2 minutes 30 seconds and then turns around and jogs

100 m

back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

14 mins ago

Discuss this question LIVE

14 mins ago

Text solutionVerified

(a)

From A to B,

A v er a g e v e l oc i t y = T o t a l d i s pl a ce m e n t / T o t a l t im e

v_{a v er a g e} = \frac{300}{150} = 2 m / sec

so velocity will be

2 m / sec

in rightward direction.

A v er a g e s p ee d = T o t a l d i s t an ce / t im e

= 300/150 = 2 m / s

(b)

From A to C,

A v er a g e v e l oc i t y = T o t a l d i s pl a ce m e n t / T o t a l t im e

= 200/210 = 0.952 m / s

A v er a g e Sp ee d = \frac{t o t a l d i s t an ce t r a v e ll e d}{t o t a l t im e t ak e n}

= \frac{400}{210} = 1.905 m / sec

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Practice more questions from Science (NCERT)

An athlete completes one round of a circular track of diameter

200 m

40 s

. What will be the distance covered and the displacement at the end of

2

minutes

20 s

Joseph jogs from one end A to the other end B of a straight

300 m

road in 2 minutes 30 seconds and then turns around and jogs

100 m

back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Abdul, while driving to school, computes the average speed for his trip to be

20

h^{- 1}

. On his return trip along the same route, there is less traffic and the average speed is

30

h^{- 1}

. What is the average speed for Abdul's trip?

View all

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Question Text	Joseph jogs from one end A to the other end B of a straight $300 m$ road in 2 minutes 30 seconds and then turns around and jogs $100 m$ back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?
Updated On	Aug 28, 2023
Topic	Motion
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 22
Upvotes	2343
Avg. Video Duration	6 min

Joseph jogs from one end A to the other end B of a straight $300 m$ road in 2 minutes 30 seconds and then turns around and jogs $100 m$ back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Text solutionVerified

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Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Text solutionVerified

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Joseph jogs from one end A to the other end B of a straight $300 m$ road in 2 minutes 30 seconds and then turns around and jogs $100 m$ back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C?